DSRC-Equipped Portable Changeable Sign for Traffic Info
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Solution Overview
Problem
Existing DSRC-based work zone traffic information systems only provide traffic information to vehicles equipped with DSRC capabilities, excluding those without DSRC components, which limits the dissemination of crucial traffic information to all vehicles.
Innovation Solution
Incorporating DSRC components into Portable Changeable Message Signs (PCMS) to intercept and display traffic information messages, allowing vehicles without DSRC capabilities to receive and view congestion warnings and travel parameters through strategically placed DSRC-equipped PCMSs, which convert and display intercepted messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If DSRC-based traffic information systems are used, then traffic information can be disseminated to vehicles with DSRC capabilities, but vehicles without DSRC components cannot receive the information
Solution Approach 1:
The patent introduces Portable Changeable Message Signs (PCMS) as intermediary devices that receive DSRC traffic information messages and re-transmit them in a format visible to all vehicles regardless of DSRC capability. The PCMS acts as a mediator between the DSRC communication system and traditional vehicles without DSRC equipment, converting digital messages into visual displays that can be perceived by all drivers.
Solution Approach 2:
The system creates visual copies of the DSRC traffic information messages by displaying them on PCMS. Instead of relying solely on the original digital message format that only DSRC-equipped vehicles can process, the system generates visual representations (text and graphical displays) of the same traffic information that can be perceived by all vehicles, effectively copying the information in a universally accessible format.
2Loss of information
If PCMS are deployed to display traffic information, then all vehicles can receive information, but the system complexity increases
Solution Approach 1:
The PCMS are designed to autonomously receive DSRC messages and automatically display the extracted traffic information without requiring manual configuration or intervention. The system self-configures by listening to DSRC communications, parsing the messages, and presenting the information in appropriate visual formats, thereby reducing operational complexity while maintaining broad information accessibility.
Data Source
AI summary
A road sign includes a display and a controller having a memory for storing messages to be shown on the display and providing signals to the display to show at least one stored message on the display. A communication link receives information issued for a vehicle, generates a message from the received information, and provides the generated message to the controller with instructions to show the generated message on the display.